<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			.bo{
				height: 400px;
				width: 800px;
				background-color: pink;
				border-top-left-radius: 10px;
				border-top-right-radius: 10px;
			}
		</style>
	</head>
	<body>
		<!-- <div style="width: 1000px;height: 700px;background-color: gray;">
			<div style="width: 100%;height:200px;background-color: cyan;"></div>
			<div style="float: left;width: 300px;height: 300px;background-color: pink; padding:10px;">
				<div style="width: 300px;height: 300px;background-color: lightcoral; display: flex;">
					<div>fdsfsfsfs</div>
					hhhahshhshs
				</div>
			</div>
			<div style="clear:both;">额外标签法</div>
			<div style="background-color: lawngreen;width: 200px;height: 200px;position: relative; display: inline-block;"></div>
			
		</div> -->


		<hr>
		<div class="bo" >

		</div>
	</body>
</html>
